The Topos of Music

While looking for something else, I came across a reference to a recent book called "The Topos of Music: Geometric Logic of Concepts, Theory and Performance" by G. Mazzola, published by Birkh"auser. Has anyone on the categories list seen this book? If so, can you say whether it is really about toposes and geometric logic as I (and most category-theorists) would understand those terms, or is it just a coincidence of terminology? Peter Johnstone